Counterfoil rule note
Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.
Document reference shall occur maximum once
Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-SR-52/
Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL
Severity note: fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.
The document reference shall occur at most once. The statement has no period and says shall. It is 43 characters. The flag is fatal. The context is an invoice line or a credit note line. The published test does not wrap the count in parentheses. It counts the document reference. The count comparison has a space before <= and a space after it.
Send at most one document reference on a line.
Illustration of the condition in the official statement. Not an example published by the source.
Fails the stated condition. An invoice line has two document references.
Passes the stated condition. An invoice line has one document reference, or none.
Copied from the source. Not reimplemented on this page.
cac:InvoiceLine | cac:CreditNoteLine
count(cac:DocumentReference) <= 1
All rule notes · JSON · Markdown · llms.txt · Invoice page · Privacy